| 摘要 |
PURPOSE:To reduce the cost of a power source by using a three-phase induction motor, and executing control of its drive and stop by driving currents of different frequencies. CONSTITUTION:As for a work robot control device, a three-phase induction motor 2 functioning as its position control motor, and a pulse generating device 3 are connected to a main shaft 1 for executing working. A position pulse signal of the main shaft 1 by this pulse generating device 3 is compared with a control signal passing through a preset counter 8 from a controlling circuit 7 by a comparing circuit 5 through a counter 4, and this output is inputted to the controlling circuit 7 through a latching circuit 6. As for said motor 2, a driving current is applied by a driving circuit 10 through an input/output device 9 from the controlling circuit 7, and it is driven. In this case, the driving circuit 10 connects a power source output terminal 10d to a high-frequency power source input terminal 10a, at the time of working, applies the driving current from a commercial power source 11 of three phases, connects said input terminal 10a to an output terminal 10b converted to a low frequency by an invertor 12 before reaching the final position, and executes damping and deceleration.
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